There is more than one artist called Sly: (1) Heavy metal band from Japan.
(2) Sly (also known as Lowell Dunbar) of Sly & Robbie, legendary dub reggae producers from Jamaica.
(3) The former moniker of OFWGKTA member Earl Sweatshirt when he was 15 in which he released the album Kitchen Cutlery. The Japanese Sly were established by Minoru Niihara (v) and Munetaka Higuchi (d) from Loudness when they have went from this group.

Read more about Sly on Last.fm.